Infanticide was a completely normal part of life in almost all historical societies though usually by drowning or smothering because they’re quieter. Exceptions are the Egyptians, Jews, Christians and Moslems. The PRC felt the need to legislate against it specifically when they conquered the last of the RoC holdouts in China in 1949 so I don’t think we need to imagine infanticide.
I am having trouble figuring out why infanticide (killing a baby that has already been born) entered a conversation about ensuring a pregnant mom and doctor are able to make healthcare decisions unencumbered from legal liabilities.